/**
 * ESTILOS - ÓPTICA B CLARO
 * Sistema de diseño moderno y responsive
 */

/* =====================================================
   VARIABLES Y RESET
   ===================================================== */
:root {
    --primary-color: #0066CC;
    --primary-dark: #0052A3;
    --primary-light: #3385D6;
    --secondary-color: #00A8E8;
    --accent-color: #FFB81C;

    --text-dark: #1a1a1a;
    --text-light: #666666;
    --text-muted: #999999;

    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #e9ecef;

    --border-color: #dee2e6;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

    --border-radius: 8px;
    --transition: all 0.3s ease;

    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* =====================================================
   UTILIDADES
   ===================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-center {
    text-align: center;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.error {
    color: #dc3545;
    text-align: center;
    padding: 20px;
}

.no-products {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

/* =====================================================
   HEADER Y NAVEGACIÓN
   ===================================================== */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--primary-color);
    color: white;
}

.btn-login {
    background: var(--primary-color);
    color: white !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: var(--border-radius);
}

.btn-login:hover {
    background: var(--primary-dark);
}

.cart-icon {
    position: relative;
    font-size: 1.2rem;
}

.cart-icon span {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent-color);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: bold;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: var(--transition);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-rating {
    margin-top: 2rem;
}

.hero-rating .stars {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* =====================================================
   BOTONES
   ===================================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-block {
    display: block;
    width: 100%;
}

/* =====================================================
   SECCIONES
   ===================================================== */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    font-weight: 700;
}

.page-title {
    font-size: 2.5rem;
    margin: 3rem 0 2rem;
    color: var(--text-dark);
    font-weight: 700;
}

section {
    padding: 60px 20px;
}

/* =====================================================
   SERVICIOS
   ===================================================== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-light);
}

/* =====================================================
   PRODUCTOS
   ===================================================== */
.featured-products,
.shop-section {
    background: var(--bg-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.product-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.product-image {
    width: 100%;
    height: 250px;
    background: var(--bg-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.product-info {
    padding: 1.5rem;
}

.product-category {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.product-brand {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.product-price {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 1rem;
}

.product-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* =====================================================
   FILTROS DE TIENDA
   ===================================================== */
.shop-filters {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.search-box {
    display: flex;
    gap: 0.5rem;
}

.search-box input {
    flex: 1;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.filter-group select,
.search-box input,
.search-box button {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
}

.search-box button {
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    border: none;
    min-width: 50px;
}

/* =====================================================
   PAGINACIÓN
   ===================================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.pagination button {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.pagination button:hover,
.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* =====================================================
   CARRITO
   ===================================================== */
.cart-section {
    min-height: 60vh;
    padding: 40px 20px;
}

.cart-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
    margin-top: 2rem;
}

.cart-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto auto auto;
    gap: 1rem;
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    align-items: center;
}

.cart-item-image {
    width: 100px;
    height: 100px;
    background: var(--bg-gray);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.cart-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cart-item-details h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.cart-item-price {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.cart-item-quantity {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.cart-item-quantity button {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 4px;
    cursor: pointer;
}

.cart-item-quantity input {
    width: 60px;
    text-align: center;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.cart-item-total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.cart-item-remove {
    background: #dc3545;
    color: white;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
}

.cart-summary {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.cart-summary h3 {
    margin-bottom: 1.5rem;
}

.summary-line {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-line.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    border-top: 2px solid var(--primary-color);
    margin-top: 1rem;
    padding-top: 1rem;
}

.payment-method {
    margin: 2rem 0;
}

.payment-method h4 {
    margin-bottom: 1rem;
}

.radio-label {
    display: block;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.radio-label:hover {
    background: var(--bg-light);
}

.radio-label input {
    margin-right: 0.5rem;
}

.empty-cart {
    text-align: center;
    padding: 60px 20px;
}

.empty-cart p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* =====================================================
   LOGIN PAGE
   ===================================================== */
.login-page {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-box {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 3rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-light);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group small {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.forgot-password {
    font-size: 0.9rem;
}

.form-divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.form-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: var(--border-color);
}

.form-divider span {
    background: white;
    padding: 0 1rem;
    position: relative;
    color: var(--text-muted);
}

.login-help {
    text-align: center;
    margin-top: 1.5rem;
}

.demo-credentials {
    margin-top: 2rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
}

.demo-credentials p {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.demo-credentials ul {
    list-style: none;
    padding: 0;
}

.demo-credentials li {
    padding: 0.25rem 0;
    color: var(--text-light);
}

/* =====================================================
   MODALES
   ===================================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s;
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 600px;
    position: relative;
    animation: slideDown 0.3s;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
}

.close:hover {
    color: var(--text-dark);
}

/* =====================================================
   NOTIFICACIONES
   ===================================================== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    display: none;
    animation: slideIn 0.3s;
}

.notification.show {
    display: block;
}

.notification.success {
    border-left: 4px solid #28a745;
}

.notification.error {
    border-left: 4px solid #dc3545;
}

.notification.info {
    border-left: 4px solid #17a2b8;
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 20px 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .cart-layout {
        grid-template-columns: 1fr;
    }

    .cart-item {
        grid-template-columns: 80px 1fr;
        grid-template-areas:
            "image details"
            "quantity quantity"
            "total total";
    }

    .cart-item-image {
        grid-area: image;
    }

    .cart-item-details {
        grid-area: details;
    }

    .cart-item-quantity {
        grid-area: quantity;
        justify-content: center;
    }

    .cart-item-total {
        grid-area: total;
        text-align: center;
    }

    .cart-item-remove {
        position: absolute;
        top: 10px;
        right: 10px;
    }
}

/* =====================================================
   ANIMACIONES
   ===================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}